Slide-feeding device for picture-projecting apparatus.



No. 757,737. 4 PATENTED APE. 19, '1904. W. M. GREEN E J. E.' GENT.

SLIDE EEEDING DEVICE EOEPICTUEE PEGJEGTINGA APPARATUS.

APPLICATION FILED JULY 3Q, 1903.

7 SHEETS-SHEET 1.

N0 MODEL.

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1 PATBNTBD'A'PR. 1 9, 1904. w. M. GREEN & J. R. GENT.

SLIDE FBDING DEVICE POR PICTURE PROJBGTING APPARATUS.

` AHLIoATIoN FILED JULY so., 1903.

no 4110mm. v Sunnis-ensm- 2.

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1 110.757,73?. PATBNTED APR. 19, 1904.

W. M. GREEN a. J. R. GENT.

SLIDE EEEDING DEVICE FOR PICTURE PROJECTNG APPARATUS.

APPLIGATIN FILED JULY 3o. 1903. Y

No MODEL. 7 sums-SHEET a.v

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O ...i mllllllllllllm m1716619 edf lnrenori Wazaamwz. @mgm a( WW@ @W "byJWM-R @mi Nogfvwrsv. l PATENPED APR19 ,'1904.

W. M.1GEEEN E J. E. GENT.

SLIDE PEEDING DEVICE EOE PICTURE PEOJEGTING APPARATUS.

v APPLICATION ILED JULY 30, 1903.

N0 MDDBL. v l 7 SHEETS-SHEET 4.

PATBNTED APR. 19, A1904.

W. M. GREEN; mi. GENT.

SLIDE EEEDING DEVICE FOR PICTURE PBOJEGIING APPARATUS.

' APPLIUATION Hum JULao, 190s;

N0 MODEL. 'I SHEETS-SHEET 5.

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N .).1757,737. v PATENTED APR. 19,` 1904.,

' W. M.'GB,BEN & J. R. GENT.

l SLIDE FEBDING DEVICE FOR .PICTURE PROJECTING APPARATUS.

APrfLIcATIoN FILED JULY-3o, 1903. I No MODEL. 7 SHEETS-SHEET c.

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No. 757,737. i I l PATENTEDAEE. 19, 1904. W. M. GREEN a; J. E. GENT.

SLIDE PEEDING DEVICE FOB. PICTURE PROJEGTING APPARATUS.,

, y APPLIGATION FILED JULY ao. laos. No MoDEI.. I 'ilsHEETs-SHEET 7.

l I mulllll nu ll" o I 'mit xI will mllllmihl,

m'nearfmatar@ 4,@ ,/Qwynd t mzzmmyfzarn W f en/t IYS ' heldface to facein the apparatus and saidslides are shifted one by one into line withthe.

no. *f5-7,737.

A UNITED STATES Patented April 19, 1904.

PATENT O-EEicE.

A WILLIAM M. GREEN, OF EVANSTON, AND JOHN R. GENT, OF CHICAGO,

v ILLINOIS. p

VSLIDE-FEEDINC-'DEVIGE FOR PICTURE-PROJECTlNG APPARATUS.

`SPECIFICATION formingpart of Letters Patent No 757,737, dated April 19,1904. Application filed July 30,1903. Serial No. 167,522. (No model.)

-To L7/Z. whom, t may concern:

Be it known that we, l/VILLIAM M. GREEN,

of Evanston, and JoHN R. GENT, of Chicago, in the county of Cook andState of- Illinois, have invented certain new and useful Improvements inSlide-FeedingrDevices forv Picture- Projecting Apparatus; Vand we dohereby declare that the following is a full, clear, and

exact description thereof, reference'heinghad to the accompanyingdrawings, and to the letters of reference marked thereon, which form `apart of this specification.

This invention relates to an improved slidefeeding device forpicture-projecting apparatus.

A device embodying our invention isof that class in which a plurality ofslides are optical axis of theprojecting apparatus and in which theaction of the device 1s automatic or is continuous or, in other words,in which the apparatus acts to automatically feed the series of slidessuccessively and continuouslyv into position for projection.

The invention consists in the mattershere-` ,'sec'tionalview of theapparatus, taken` on j a plane adjacent to theffront platethereofndicated by the line 55 offFig. 2., FigA is a detail section onlline 5"..5L of Fig.. 5.. Fig; 5b: yis a de tailsection on line 5iiof'Fig. 5.' Fig.`

(ivv is a detail plan section 'taken' through the front plate of theapparatuson line ,6' 6 of Fig. Eig. r;isgadea11-fae View of the' parasho wn at the, pper right-heli@ 'corner Vof Fig. 5mt-1 1 :the mais@parts fof theSpiis-motgr which 'operate the actuating-arms of thetiming mechanism removed, so as to show said arms in full. Fig. 8 is adetail face View of the rear plate of the machine with partsthereonrnounted. Fig. 9 is a plan section .taken upon line 9 9 of Fig.8. Fig. 1() is a detail vertical sectionthrough the front plate of'l themachinev and adjacent parts online 10 10 of Fig. 3.

Fig. 11 is a detail section'taken on line 1v1 11 ,K thelantern orhousing which contains the lamp or burner which supplieslight for theprojectingv apparatus; B, the tubular-casing containing thecondensing-lenses; C, the tube congtaining the projecting-lenses, and Da light- "excluding casing or housing of tubular forni,

which is connected with the'movable outer .section of the lens-tube C bymeans of a bellows-section D. .The parts described constif but@ aPiCule-DTOJ-etng apparatus of farnlrfr 'lar form and constitute no partof the present-ff invention.

The frame of the slide holding and feeding device consists principallyof a front plate-E connected by a base hoard or plate. `Said plates Eand F vare arranged vertically 'and parallel with each other and atright angles to the optical axis of the said projecting apparatus. vThesaid front plate E projects across or in front of the condensing-lenstube B between the same' and the objective-lens tubeC,

as clearly seen in Fig. 1, and said plate has an v h is and a rear plateF, which are attached to and Y in theopt'ic'alams ofthe projectingappara us'. jV 'l kSaid front' plate `is also provided with 'openings orapertures e' e2 of suitablesize forthe passage ofthe slides', as clearlyseen 'in Figl. On thefront orv outer face of, the "said plate E ismounted a rotative'slide-carrier, preferably' having the form of avcircular Vplatev or disk. .Said'fslds-Carrier sgsecured' to' 'thefrcfitend of a horizontal. shaft G", which passes through andhas bearingin,said plates E 'and F. Vv'The said slid'eicar'rierG is provided with fourequally-spaced and symmetrically-arranged openings or apertures g g,each of proper size and shape to receive one of the slides, which latterare indicated by Sa. Said apertures g g constitute holders for theslides in which the said slides are separately held and in which throughthe rotative motion of the slide-carand in width at one side thereof togive room for the lantern A, and said rear plate is provided with twoopenings or apertures for the passage of the slides S, which arearranged the uppermost one f in alinernent with the vuppermost aperturee of the front plate E, and the lowermost one f in alinement with theaperture e2 of the said front plate. front and rear plates E and F andadjacent to the bottom and side margins of the apertures e and`f extendparallel supporting-rods H H, and like supporting-rods I I extendbetween said plates adjacent to the sides and bottoms of the aperturese2 and f'. vThe two groups of rods H H and I I constitute holders forthe several slides in which the same rest or are supported inface-to-face relation. uppermost holder formed by the rods H H, which islocated above the shaft G', constitutes the delivery-holder or that fromwhich the slides are delivered to the carrier G preparatory to beingcarried by said carrier into position for projection. The lowermost orlateral holder formed by the rods I I constitutes the receiving-holderto which theV slides are delivered from the carrier G after the samehave been carried by said carrier into and past the position forprojection. l

A rotative slide-carrying'mechanism is located at the rear of said rearframe-plate F for j carrying or shifting the slides from the receivingto the delivery holder. lThis latter deviceembraces a disk G2, which isattached to and turns with the shaft G', and four arms J J J J which arepivoted to said disk G2 and which act upon the slides to carry or movethe same edgewise from the rear end of the receiving-holder to the rearend of the deliveryholder. The said disk G2 and its arms J J, beingattached to and turning vwith the shaft G', rotate in the same directionas the slidecarrying disk G and have a corresponding intermittentrotative movement.

The carrier G is turned in a direction to carry the slides from theupper or delivery holder toward the position for projection, While thecarrier formed by the disk G2 and Between the The arms J J is turned ina direction to carry the slides from the receiving to the deliveryholder. The center lines of the slide-holders and the optical axis ofthe projecting device (coinciding with the center of the laperture e inthe front plate E) are located at equal distances from the axis ofrotation of the front and rear slidecarriers, so that a slide receivedby the carrier G from the deliveryholder will be carried by the latterinto posi- Vtion for projection, while at the same time another slidewill be carried by said carrier G into position opposite the front endof the receiving-holder, and a slide received from the rear end of thereceiving-holder will be carried by said disk G2 and one otits arms Jinto a position opposite the rear end of the delivery-holder. j Y

Devices are provided for turning said carriers adapted to give,intermittent rotative movement`thereto and to turn the same a quarterof a complete rotation at each movement, thel two holdersvand theoptical axis of the lprojecting apparatus being located with respect tothe axis 'of rotation of the carriers at angles of ninety degrees toeach other, so that aslide delivered to one of the openings g in thecarrier G from the Aupper or delivery holder is carried by saidcarrierfirst into position for projection, then to a position vertically belowthe delivery-holder, and then into a position opposite thereceiving-holder, to which the slides are delivered from the carrier. Inconnection with said rotating carriers and means for rotating the samedevices lare provided for thrusting or'forcing the slides from the saidcarriers'into thel holders, these devices being located at a point infront and rear of the carriers and acting on the slides to thrust themtoward the slides already in the holders and to move all of thosepreviously inserted into the holders endwise of the same, these devicesbeing adapted to move the slides forward step by step a distance equalto the thickness of the slides at each step, so as to deliver the saidslides one by one from said holders to the carriers.

The rotative carriers at the front and rear of the apparatus areoperated through the medium .of the shaft-G', which is driven in theconstruction shown by means of the springmotor. y (Indicated as a [wholeby K and shown Lin Figs. l, 2, and 13.) Said spring-motor, as sho/wn, isof familiar form, having coiled springs lo lo, mounted on awinding-shaft la', and provided with a shaft K', which is driven bysuitable gearing from the coiled spring and is provided with asprocket-wheel K2, from which motion is transmitted, by means -of achain belt'K4, to a sprocket-wheel G3 on the forward end of the shaft G.

Provision is made for giving the necessary rotative intermittentmovement to the shaft G/ or, in other words, for automaticallycontrolling the rotation of the rotative slide-car- Ioo IIOv

riers and shaft G so that the movement of the carrier Gr shall` bearrested when a slide has reached the position for projection, will beheld stationary for the exposure 'of the picture a desired length oftime, andk again permitted to move a quarter-rotation to bring anotherslide into position for projection. Such devices, as herein shown, areassociated with said carrier Gr and are constructed as follows: On theouter faces of said carrier G are secured four stops g g', adapted forcontact with a pivoted detent L, which latter is mounted on the frontface of the plate E, near the upper edge thereof, as clearly seen inFig. 3. The stop projections g g and the detentlever L are so arrc ngedthat when either one of the stops is in contact with the detent thecarrier will be held in position with the slidecarrying apertures gopposite the receiving and delivery holders and in line with the opticalaxis of the projecting device'.

Provision is made for shifting or moving automatically the detent L soas to bring the free or movable end of the same out of line with thestop-lugs g g', consisting of devices made as follows: L is ahorizontally-arranged pivoted lever mounted on the front face of theplate E with its free end overlapping the margin of the carrier Gr andin position for contact with a series of four stop-pins g2 g2 on saidcarrier, said pins being so arranged that when they come in contact withthe free end of the. lever L they will lift the same. A trip-lever L2 isalso'mounted on the upper part of the plate E, said lever having aforked end which engages a pin Z' in an upwardlyextending arm Z on thelever L. The downward movement of the lever L2 is limited by means ofthe stop-pin Z8. L? designates a weighted slide-bar, which is mounted toslide vertically in guide-brackets Z3 Z4', attached to the rear face ofthe plate E, and Athe upper end of which projects forwardly over the topof the said plate and over the end ofY the triplever L2 opposite thatengaged by the detent L. The said forwardly-projecting upper end ofthebar L3 is connected with the lever L' by means of a link Z2. The pins g2acting on the lever L serve to lift the weighted slidebar L3 preparatoryto the action thereof upon the lever L2. When so lifted, however, thesaid slide-bar L3 is supported in its elevated position by means of adetent-lever Li. (Shown in Figs. 5, 6, and 7.) Said detent-lever Li ispivoted to the upper surface of the upper guidebracket Z3, Figs. 5 and6, so as to swing horizontally above the said upper guide-bracket, andAhas between its ends a holding-tooth Z5, which is adapted to engage adownwardlyfacing shoulder on the slide-bar L3, herein shown` as formedat the upper end of a groove Z6 in the face of said bar. Thedetent-lever L4 is thrown or held toward the slide-bar by means of aspring Z', and the parts -are so arranged that when the said slide-baris lifted by the as soon as the said bar is lifted to the upper limit ofits movement, and therebyholds said rod in its elevated position afterthe pin g2 vhas moved past the end of the lever L L Said pins g2 arelocated in advance of the stop-lugs g on the carrier G, so that the saidpins serve to actuate the lever L' and lift the slide-rod L3 toitselevated position, thereby permitting the detent-lever L to descend bygravity into position for contact with the said stop-lugs before thelatter reach the detent-lever. It follows that when either stop-lugreaches said lever and strikes the same the disk will be thereby heldfrom further rotation and will remain immovable in position with one ofthe slides in position for projecting so long as the said slide-bar L?retains its elevated position. W'hen, however, the detent-lever L4 ismoved so as to disengage it froml said slidebar, the latter will descendand by striking a hammer-like blow upon the end of the lever L2 beneathit will depress the said end of the lever L2, ,audit-hereby lift thelopposite end of the said lever and the detent-lever L, and

thereby release the slide-carrier and permit it to turn aquarter-rotation under the action of the spring-motor which actuates it.At the end of such quarter-rotation the next succeeding stop-lug gwillstrike the detent-lever L, and the carrier will be thereby held frommovement until again released bythe dropping of the slide-bar in themanner described.

it is obvious that thertime of exposure will be determined bytheinterval of time between the arrest of the carrier G through the actionof the detent L and the time of the release of the same through thedropping of the slidebar L3, and a device embracing a clockwork ortiming mechanism is provided for operating the detent-lever Li torelease the slide-bar, and thus eect the release of the slide-carrier ata desired period of time after the same has been stopped by the actionof the detentlever. Y y

As shown in the accompanying drawings, M indicates as a whole `aspring-actuated timing mechanism embracing the usual coiledactuating-spring m and a train of gears which drives a slowlyturningshaft or arbor m. This arbor has attached to its forward end adjacent tothe inner face of the plate E a disk m2. To the face of this disk arepivoted two weighted arms M by means 'of pivot-pins m3, located a shortdistance from the shaft m. The inner ends of said arms M extend past thesaid ,pivot-pins m3, and are adapted to come in contact with the saidshaft viv/,so that the weighted arm, which is at the rising side of thedisk, will IOO the disk the weighted arm M', pivoted thereto, will fallforwardly and downwardly until it hangs in a vertical position from thesaid pivotpin. The .outer ends of said weight-arms M are, moreover,provided with beveled surfaces mi, and the said ends of the arms areadapted to pass between the rear face of the plate E and the free end ofthe detent-lever L4 in such manner that the said beveled surface mt willact on the said lever to force the same outwardly or rearwardly andrelease the slidebar L3. The shaft m and disk m2 are turned so slowlythat the pivot of each weighted arm will be carried over the shaft andthe arm will fall forward into contact with and actuate the lever L4 atthe intervals of time required for desired exposure of the slides orpictures.

1t will of course be understood that the arms M would operate in thesame manner to release the slide-,bar L3 at desired intervals if saidarms were rigidly attached to the shaft m', inasmuch as the time ofrelease through the action of the arms depends upon the rate of speed ofrotation of the said shaft m', the weighted arms, pivoted to the shaftso as to drop, as described, being employed to aord a prompt or quickreleasing movement in the detent-lever Lf.

For the purpose of controlling the speed of rotation of theslide-carrier G and connected parts a device is provided as follows:Said carrier G has the form of a circular disk provided with peripheralgear-teeth g3, which intermesh with a gear-pinion a on a shaft N, whichis mounted at one end in the plate E and at the other end in asupporting-plate 1u', attached to the outer surface of said plate E. Ona shaft N', which also has bearings in the plate E and plate u, ismounted a disk l 2, carrying a series of fan-blades off Gearwheels n3 n*on the shafts N N serve to transmit motion from the gear-wheel n to theshaft N. These gear-wheels are arranged to give a high rate of speed inthe fan-blades, so that the latter, through the resistance of air onsaid blades, limit the speed of rotation of the said carrier, it beingofv course understood that the purpose of limiting the speed of saidcarrier is to prevent the same acquiring so high a degree of velocity asto produce objectionable impact or jar when its motion is arrested bycontact of the stop-lugs g' with the detent L. By reason of the factthat the fan-disk N2 and the fan-blades thereon will be revolving at ahigh rate of speed when the movement of the carrier is arrested ayielding connection is provided between the fan-blades and the shaft N,on which the same are mounted. Such yielding connection is made bymounting the disk N2 to turn on the shaft Nl and by attach.

ing to the shaft a ratchet-wheel n, which is engaged by aspring-actuated pawl a7 onthe disk N2. This construction permits thefans v to revolve freely on the shaft in the direction in which saidfan-blades rotate, while insuring that the fan-blades shall rotate withthe shaft when the latter is turned by the action of the carrier G andintermediate gearing, as described.

Now referring to the devices for shifting or moving the slides from thecarrier G to the receiving-holder and moving the said slides through thesaid holder and also for shifting or delivering the slides fromengagement withthe disk G2 and carrying-arms J J at the rear of theplate F to the delivery-holder and moving them through the latter'holder, these parts are constructed as follows: The devices forv soshifting or moving the slides are operated from a'single shaft O, whichhas bearings in the plates E and F and is arranged parallel with theshaft G, said shaft O being vpreferablyllocated at the side edges ofsaid plates and near the bottom edges thereof. Said shaft Q, has anintermittent rotative movement and is driven from the shaft G/ by meansof a sprocket-wheel G4, which is secured to said shaft Gl at the rear ofthe plate F, a sprocket-wheel O', mounted on the shaft O, and a chainbelt O2, which is trained over the sprocket-wheels GIl and O.

rlhe devices at the forward end of the machine for thrusting or forcingthe slides from the slide-carrier G into the receiving-holder areconstructed as follows: P, Figs. 1, 2, 3, 10, and 14, is asupporting-plate arranged outside of and parallel with the carrier G.Said plate is supported at its outer end from the frame-plate E by themeans of two posts or studs p p, Fig. 2, and at its inner end issupported or held in place by engagement with the shaft GQ the saidplate being provided with an aperture through which the shaft passes andbeing confined between a hub g5 at the center of the carrier G and thehub of the sprocket-wheel G3, as clearly seen in Fig. 14. Mounted on theouter face of the plate E is a horizontally-arranged rock-shaft P. Saidrock-.shaft has depending parallel arms p', which are connected at theirlower ends with pistons or sliding rods p2, which pass through and areguided in guide-,sleeves P2, secured to the outer Vface of the plate P.To the inner ends of the plungcrs p2 are secured presser-plates P3,Figs. 5, 10, and 14, which act directly upon the slides in the endwiseinward movement of the plungers p2. At its outer end the rock-shaft P isprovided with an outwardly-extending rigid arm P, Fig. 2. In said arm issecured a wrist-pin p4, Fig. 3. The said arm is longitudinally slotted,and the wrist-pin is made endwise adjustable therein, as clearly seen inFigs. 2 and 8, the adjustable connection of the wrist-pin with the armbeing for the purpose of enabling the stroke or movement of the plungersto be varied or adjusted as desired. Connected with the said arm P* is apitman-or connecting-rod Q, Fig. 2, the upper end of which is engagedwith the wrist-pin p* and the lower end of IIS Vturned and the plungers102312 will be thrust inwardly with the presser-plate P3 P, theInovement given to the said plunger and presserplate beingsuliicient tocarry a slide from its position in the aperture g of the carrier Grinwardly through the plate E until it rests upon the rods I I,constituting the receiving-holder.

When Athe slides are received in the apertures g g of the slide-carrierG from the de of the carrier and project inwardly over said apertures,the said clips thus arranged serving to limit the outward movement ofthe slides when they are thrust into said apertures from thedelivery-holder and to conne said plates from'outward movement or fromfalling out of Athe apertures during the rotation of the carrier. Itwill .of course be understood that the slides are held from inwardmovement during rotation of the carrier by contact with the outersurface of the frameplate E, against the face of which the carrier (jrrotates. When, however, either aperture g of the carrier is in positionfor the delivery of aslide therefrom to the receiving-holder,

the said aperture g in the carrier will be op-v presserrplates P3, whichby their pressure on the outer face of the slide in the said aperture gwill thrust it inwardly through the opening upon the supporting-rods I Iof the receiving-holder.- j

ln order to insure that the plates thus thrust inwardly through theopening e2 shall be held in a vertical position and in Contact withthose alreadywithin the said holder and shall not fall outwardly, so asto interfere with the subsequent free rotation of the slide-carrier,holding devices are provided, consisting of springpressed detents R,Figs. l() and 5". Said detents R each consist of a sliding bolt mountedin a guide-bracket R in position to project over the opening e2 andwhich is held in its forward position by means of a spring r, hereinshown, Fig. 5, as having the form of wire spring secured to the rearface of the plate E and pressing on the inner end of said bolt. Theinner ends of the boltsR are beveled so that they will be pressed orforced outwardly plates S2, as clearly seen in Fig. 2.

when the edges of the slides come in contact therewith, and thus permitthe slides to pass the same. The bolts spring forward behind the outerfaces of the slides as soon as the slides have been thrust inwardly pastthe detents. The position of the slides, with the detents R engaging theoutermost or last-inserted slide, is clearly shown in Fig. 10.

Now referring to the parts at the rear of the machine forintroducing/the plates into the igeceiving-holder, these parts aresubstantially like those on the front plate E and are made as follows:S, Figs. 2 and 4, is a plate corresponding with the plate P andsupported at its upper margin by studs ssfrorn the plate F and engagedat its lower end with the shaft G.' S is a rock-shaft which is mountedin bearings s s on the plate S and whichalso has a bearing 'f2 locatedadjacent to the side margin of the frame-plateV F. The rock-shaft Slcarries depending rocker-armss', which act on plun gers s?, which havesliding engagement with guide- 'sleeves S2, attached to the plate S. l.At their inner ends the said plungers s2 carry presser- The saidrock-shaft S is provided at its outer end with a rigid arm S4, withwhich is connected acon- 'necting-rod T, the lower end of'fwhich` isvpivvoted to the strap T3 of an eccentric T2 o`n-the -shaft O. On theinner face of the said plate F, adjacent to the aperture f thereinthrough which the slides are inserted, are located spring-detents U U,which are constructed and operate in the same manner as the detents R Ron the front plate E, before described. The

Vtwo eccentrics Q2 and T2. on the shaft O are mounted in the sameangular position on the shaft, so that a single rotation of said shaftgives corresponding movement to the rockvshafts P and SV and thepressers carried vnot turn with said shaft G', but is turned at timeswhen the slide-carrier G and disk G2 are stationary or during theintervals between the turning movements of the shaft G', a con- 1nectiony b'eing provided between the sprocketwheel O', which isv drivenfrom the shaft G', and the shaft O, embracing a spring U, which isplaced under tension through the turning of the sprocket-wheel Q on saidshaft and which acts to turn the shaft O after each partial rotation ofthe shaft Gr. Said shaft O is held from rotation and is permitted toturn through the action of the spring Vat desired times by devices madeas follows: The spring V, as clearly ,shown in Figs. 11 and 12, is acoiled spring which is attached at its inner end to a sleeve t ontheeccentric T2, ,which turnswith said shaft, while the outer end of lIOsaid spring is secured to the outer margin of a disk O2, which isrigidly attached to the sprocket-wheel O', which latter is mounted toturn on said sleeve t. A second disk O3, also arranged to turn on thesleeve t, lis vshown as connected with the disk O2 by means of studs 0,with one of which the outer end of the spring V is connected. It followsfrom this construction that when the sprocket-wheel O is turned orrotated by the action of the chain belt O2 and the sprocket-Wheel G4 thespring V will be placed under tension, the shaft O at this time beingheld from rotation. The sprocket-wheel G4 is shown as made much largerin diameter than the sprocket O', so that during the quarter-revolutionof the shaft G said pinion O will be given somewhat more than a completeturn. For holding the shaft O from rotation .during the winding ortightening of the spring V said shaft is provided with a rigid stop-armO, Fig. 5, located at the rear of the front frame-plate E. Said arm isadapted for contact with a sliding detent W, which passes through theplate E to the front face thereof and is there connected with avertically-arranged actuating-lever W', Fig. 3. Said lever W is pivotedat its lower end to the plate E, Fig. 2, and is provided with a springw, which acts on the lever in a direction to force the upper end thereoftoward the said plate E to thereby hold the end of the detent W, whichextends through said plate, rearwardly or in the path of the arm O4. Theupper end of the lever W rises to a point opposite or in front of theslide-carrier G, and

f said carrier is provided with four cam projections or cam-plates w',adapted for contact with the said upper end of the lever W' and to actupon the same in a direction to throw the lever forwardly or outwardlyand to thereby draw the rear end of the detent W forwardly and out ofthe path'of the arm O3. The cam-plates w and the levers W are soarranged with respect to each other that the lever will be thrownoutwardly by each camplate and the detent W released from the stoparm OSat times when the slide-carrier-G is stationary or held from rotarymovement and the slides carried thereby are in position opposite theopenings in the plate E. As soon as the arm O4 is released the shaft Owill be turned by the action of the spring V and will make one completerotation, the shaft at the end of such complete rotation being againarrested by the detent W, which will have returned to its originalposition in the path of the said arm O3 during the turning of the shaft.It will of course be understood that the cam-plates w are arranged tomove the detent W and permit the shaft to begin its rotary motion justbefore the movement of the carrier G is arrested, and the lever W willhave passed from engagement with the camplate when the carrier hasreached its position 0f rest, as shown in Fig. 3, so that the saidquired for releasing the lever W from the `cam-plate w' engagedtherewith, occurring after the beginning of the turning of the shaft O,will not interfere with the movement of 'said carrier lG and the arms J,as the said carrier and arms will have come to a state of rest y beforethe said pressers P3 and S3 come in contact with the slides.

The shaft O being turned by the action of the spring, as described, therotative movement thereof will be very rapid, and in order to preventany rebound of the arm O3 after it strikes and is arrested by the detentW a device is provided for preventing any backward movement of said armO4. This device consists of a spring detent-arm W3, Fig. 5, which issecured to the rear face of the plate E and is arranged with its freeend in position to engage the end of the arm O4 at the side thereofopposite that which comes in contact with the detent W. As will bereadily understood from the drawings, when the said arm O4 approachesthe limit of its rotative movement it will strike and press outwardlythe end of the 'detent-arm, which latter will spring back into placeover` the arm as soon as the latter strikes the detent W, and thus holdthe said arm and the shaft O from any backward movement.

Now referring to the devices on the rear frame-plate F for shifting ormoving the slides from the receiving to the delivery holders and whichembraces the disk G2 and arms J, above described, these devices areconstructed as follows: The disk G2, Figs. 4, 8, and 9, is provided withfour straight edges or marginal surfacesg7 97, which correspond inposition with the inner margins of the two slide-openings f f in theplate F, and the 'arms J J are pivoted to said plates by means of pivotsj', which are located in such position that when the arms are extendedthe advance edge of two of the arms coincide in position, one with lthelower margin of said opening f' and the other with the right-handmargin, as seen in Fig. 8, of the opening f. The disk G2 is, moreover,provided with clips g5, secured to the rear face thereof and eX- tendingpast the edges 07 to form stops for the slides when the latter arethrust outwardly from the receiving-holder. The arms J are provided withlike plates or clips j', which serve to prevent the margins of theslides being pushed outwardly beyond the edges of the arms J when saidslides are thrust from the said receiving-holder. Said arms J are IOSprovided at their inner or pivoted ends with extensions f2, adapted forcontact with stops gs on the face of the disk G2.' Said stops serve tolimit the movement of the armsJ in one direction, so that when said armsare at the rising side of the disk G2 the weight of the outer endsthereof will by bringing their arms f2 against the stops gs hold thearms rigidly in their extended positions. When the arms are thus heldrigidly extended at the upwardly-moving side of the disk, they will bein position to engage and move the slides that are delivered theretothrough the opening f from the receiving-holder. By reason of thepivotal connection of the said arms J with the disk G2, however, saidarms when they reach the descending side of said disk will swing abouttheir pivots and hang in a vertical position, as shown at the left hand'of Fig. 8, and will freely hang by gravity until their arms f2 are againbrought into Contact with the stops g8, when the arms again approach thebottom of the said opening f.

The end gained by pivoting the arms J in the manner described is toavoid interference of said arms with the lantern A or parts associatedwith such lantern, such as electric wires or pipes for supplying gas, itbeing obvious that in the construction described, as clearly shown inFig. 4, the arms J J when hanging freely at the descending side of thedisk G2 project only a short distance from the side margin of the disk.

In connection with the disk G2 and the arms J J thereon a curvedstationary guide-strip F is applied to the rear face of the plate F,said guide-strip being concentric with the'shaft G and arranged tooverhang kthe openings ff. Said guide-strip F 1 s providedv in its innerface with a groove or rabhet equal 1n depth to 4the thickness :of theslides, and said strip erves as a guide for the outer margins of thesaid shdes as the same are moved by the action of the revolving disk G2and arms J J from the openingf to the opening j'.

As clearly seen in the sectional view Fig.

9, the slides held in the receiving-hold and pushed therethrough by thepushing devices at the front end of the apparatus, hereinbeforedescribed, pass one by one through the opening fI in the plate F andinto position to rest upon the arm J which is at the time beneath thesaid opening f,'the slides at such time having their inner end marginsin contact with the adjacent side edge gl of the disk G2 and their outerend marginswithin the grooved guide F. Vhen the disk G2 makes aquarterrotation, the arm J, then engaged with a slide, carries the samealong the outer face of the plate F until the slide is opposite theopening f of the delivery-holder, when the pressers S3 S3 operateA uponsaid'slide to push the same through the said opening f and into thesaid'i delivery-holder.

In order tohold the arms'J in an upright position when they reach theopeningf.l thereforward and interfering with the action of thepressers,'a retaining device is employed consistingot1 ahorizontallyarranged detent-l'ever F2, Fig. Ai, which is pivoted totheplate F and is adapted to swing in a. plane just outside of the plane ofsaid arms J.- Each of said arms is provided with an outwardly-projectingpin f3, and the lever F2 has a downwardly-inclined prong f3, adapted toengage said pin ,f3 at the time the armJ is in its vupright position.The lever F2 may be held or pressed downwardly ,against the pin jB/bymeans of a spring f4, which .is hereinshown as connected with the plateF and the outer end of the same. The inclined prong or tooth f3 on thedetent-lever Y is so arranged as to release the arms J shortly afterthey begin their forward'movement from their vertical position, so as topermit said arms to fallforwardly, and' thus as sume a dependingposition when they reach the downwardly-moving side of the disk G2.

To provide for enlarging or contracting the lengthof the twoslide-holders, the rear plate F is adapted' to be moved or shiftedV onvthe base-support toward and from the Vfront plate G.V The rods I and J,constituting said holders, are made telescopic, and the shafts G' and Oare longitudinally grooved, and the sprocket-wheel G as well as thesleeve z5 of the eccentricT are provided with feathers or splinesadapted to engage the grooves in the said shafts Gl and O.y

lt is to be understood that the accompany-V ing drawings illustrate onefor'mvof device in which the general features of our invention may beembodied in practice and that the details and specic features ofconstruction shown in said drawings and hereinbefore described aremerely illustrative and do not constitute essential'parts of ourinvention except so far as the same may be set forth inthe appendedclaims as constituting features thereof.

We claim as our inventionl. A slide-feeding apparatus comprising adelivery and a receiving slide-,holden and a rotative slide-carrieradapted to receiveI the slides from the delivery-holder, to carrytlife,sam v into position for projection fr'rdto thenc'ar j said slidesinto positionl Ylfvery tothe receiving-holder.

Z A slide-feeding delivery and a/rece'ii'7 tive slide-carrier adapteeeeilve slides from the delivery-holder, to ca ythe same into positionfoi' projection .and'tf then carry said slides'into position fordelivery to the receiving-'lholder'and means for shifting the slidesfrom the said slide-carrier into the receiving- 1,. holder.

parat-us comprising a slide-holder, a rotatwo slide-holders arrangedparallel with each by avoiding possibility of said arms falling Y IOOIOS

IIO

slide feeding apparatus comprising other, rotative slide-carriers forshifting the individual slides from one holder to the other, at bothends of the holders.

4:. A slide-feeding apparatus comprising two slide-holders arrangedparallel with each other, and rotative slide-carriers for shifting theindividual slides from one holder to the other, at both ends of theholders, one of said slide-carriers being adapted to carry the slidesinto position for projection in their passage from one holder to theother. Y

A slide-feeding apparatus comprising a deliveryand a receivingslide-holder, a rotative slide-carrier adapted to receive the slidesfrom the delivery-holder, to carry the same ratus, of two parallelslide-holders, rotative VSO slide-carriers located at opposite ends ofthe holders and adapted to receive the slides from the'holders, theslide-holders and the optical axis of the projecting apparatus beinglocated at equal distances from the axis of rotation of the rotativeslide-carriers and means acting to thrust the slides from the carriersinto the holders.

7. A slide-feeding apparatus comprising two slide-holders, rotativeslide-carriers located at opposite ends of the holders and adapted toreceive the slides from the holders and means acting to thrust theslides from the slidecarriers into the holders and to move/them throughthe latter. -fv

8. A slide-feeding apparatus fcomprising two parallel slide-holders,rotative slide-carriers located at opposite ends of the holders, adaptedto receive the slides from the holders, and reciprocating pressersacting to shift the slides from the carriers into the holders and tomove them through the latter.

9. The combination with a projecting apparatus, of two slide-holders,rotative slide-carriers at both ends of said slide-holders for shiftingthe individual slides from one holder to the other, saidslide-holdersand the optical axis of the-projecting apparatus being located at equaldistances-frgmthe axis of rotation or' the slide-carriers, onefof saidslide-carriers being adapted to carryntliecslides from one holder intopositioxri'eprojection and to then carry said slides :into position'fordelivery to the other holder;A and means for shifting the slides fromthe carriers into the holders and for moving them through the latter.

10. A slide-feeding apparatus comprising two slide-holders, rotativeslide-carriers at both ends of said slide-holders for shifting theindividual slides from one holder to the other, one of saidslide-carriers being adapted to carry the slides from one holder intoposition for projection and to then carry said slides into position fordelivery1 to the other holder and reciprocating pressers for shiftingthe slides from the carriers into the holders and for moving the slidesthrough the holders.

11. A slide-feeding apparatus comprising two slide-holders, rotativeslide-carriers located at opposite ends of the holders, means acting tomove the slides through the holders, and means for giving intermittentrotative movement to the said slide-carriers, one of said slide-carriersbeing adapted to carry the slides into position for projection, and tohold them there during the intervals between the movement of theslide-carriers.

12. A slide-feeding apparatus comprising two slide-holders, tworigidly-connected rotative slide-carriers located at opposite ends ofthe holders and adapted to receive the slides from the said holders, andreciprocating pressers acting to thrust the slides from the carriersinto the holders and to move them through i Jfrom the holders, meansacting to thrust the slides from the carriers into the holders andthrough the latter, and means for giving intermittent rotative movementto the slide-carriers.

14. A slide-feeding apparatus comprising two parallel slide-holders,rotative slide-carriers located at opposite ends of the holders,reciprocating pressers acting to thrust the slides` from the carriersinto the holders and through the latter, means for giving intermittentrotative motion to the said slide-carriers, and means for actuating thesaid pressers adapted to advance the same during the intervals betweenthe turning movements of the slide-carriers.

15. A slide-feeding apparatus comprising two slide-holders, rotativeslide-carriers located at opposite ends of the said holders, a rotativeshaft on which both of said slide-holders are mounted, and means forgiving' intermit tent rotative movement to said shaft.

16. A slide-feeding apparatus comprising a receiving'and a deliveryslide-holder, a rotative slide-carrier, and means for givingintermittent rotative movement to the slide-carrier consisting of amotor applied to give rotative movement to said slide-carrier, aplurality of stops lon the slide-carrier, a detent adapted to engagesaid stops to arrest the. movement of the slide-carrier, and means foractuating the said detent to release it from said stops.

17. A slide-feeding apparatus comprising a receiving and a deliveryslide-holder, a rotative slide-carrier, and means for givingintermittent rotative movement to the slide-carrier consisting of amotor applied to give rotative movement to said slide-carrier, aplurality of stops on the slide-carrier, adetent adapted to engage saidstops to arrest the movement of the slide-carrier, and. aspring-actuated timing device for moving said detent to release it fromthe said stop.

18. A slide-feeding apparatus comprising a delivery and a receivingslide-holder, a rotative slide-carrier, spring-actuated means operatingto turn the slide-carrier, and a stop mechanism for the slide-carriercomprising a plurality of stops on the carrier, a detent adapted toenga-ge the said stops, a vertically-arranged slide-bar adapted toact byimpact upon the said detent, a detent for holding the slidebar in itselevated position, means actuated by the carrier for lifting theslide-bar into its elevated position, a detent for holding said slidebarin its elevated position, and means acting on said slide-bar detent torelease the same from the slide-bar at desired intervals.

19. A slide-feeding apparatus comprising a delivery-and a receivingslide-holder, a rotative slide-carrier,spring-actuated means operatingto turn the slide-carrier, and a stop mechanism for the slide-carriercomprising a plurality of stops on the carrier, a detent adapted toengage the said stops, a vertically-arranged slide-bar adapted to act byimpactupon thesaid detent, a detent for holding the slidebar in itselevated position, means actuated by the rotative carrier for liftingthe slide-bar detent in its elevated position, and a springactuatedtiming mechanism acting on said slide-bar-supporting detent to releasethe slidebar at desired intervals.

' 20. The combination with a rotative slidecarrier and means for turningthesame, of a stop mechanism comprising a plurality of' stops on theslide-carrier, a detent adapted to engage said stops, avertically-moving slidebar adapted toact by impact upon said detent,means operated by the rotative carrierl for lifting the said slide-bar,a detent kwhich holds the slide-bar in its elevated position, a rotativeshaft provided with an arm adapted to engage said detent to release itfromfthe slide-bar and means for giving rotative movement to said shaft.

21. rlhe combination with a rotative slidecarrier and means for turningthe same, of a stop mechanism comprising a. plurality of stops on theslide-carrier, a detent adapted to engage said stops, avertically-moving slidebar adapted to act by impact upon saiddetent,means operated by the rotative carrier for lifting the said slide-bar, adetent which holds the slide-bar in its elevated position, a rotativeshaft provided withanarm adapted to engage said slide-bar detenttorelease it from the slide-bar, and a timing mechanism embracing anactuating-spring and a train of gears adapted to give rotative movementto said shaft.

22. The combination with a rotative slidecarrier and means for turningthe-same'of a stop mechanism comprising a` plurality of stops on theslide-carrier, a detent adapted for shaft andan arm pivoted to saidshaft and.

adapted for engagement with the said slidebarvdetent, said arm beingweighted and provided with a stop projection adapted to hold the'arm inan extended position when at the rising side of the shaft and to permitthe arm to fall by gravity when it passes over the axis of the shaft.

23. The combination with a slide-holder, and a rotative slide-carrier,of a reciprocating .presser and -means for operating said presser ing-,arock-shaft provided with arms which arelconnected with the holders andalso with actuating-arms, a rotative shaft provided with two eccentrics,and connecting-rods for transmitting motion from said eccentrics. to theactuating-arms of the roch-shafts.`

25. A slide-feeding apparatus comprising two slide-holders, rotativeslide-carriers at opposite endsof the holders, a shaft on which `saidcarriers are mounted, means applied to give lntermittent rotativemovement to said shaft, 'acting' to turn the said ,shaftI a part of arotation at each movement thereof, reciprocating pressers, apresser-actuatingshaft connected with the pressers and adapted to ad-IOO Vance and retract the same by a complete rotation of said shaft,driving connections between said slide-carrier shaft ,and presser-actuating shaft, yembracing a spring, and means actuated by one of theslide-carriers acting to control the turningvmovements .of the saidpresser-actuatingshaft.

26. A slide-feeding apparatus comprising two slide-holders, rotativeslide-carriers lo-V cated at opposite ends of lthe holders, a rotativeshaftvon which both of Asaid slide-,carriers latter shaft and meansoperated by one "of the said rotative slide-carriers acting to controlthe turning movements of said presser-actuating shaft so as to permitthe rotation of the.

ing shaft, means for giving intermittentvpartial rotative movements tothe slide-carrier shaft, a rotative part on the presser-actuating shaft,'a spring connecting said rotative part c with the latter shaft, astop-arm on the presseractuating shaft, a detent adapted' to engage saidstop-arm, and means operated by one of said rotative slide-carriersacting onsaid detent to control the turning movements of saidpresser-actuating shaft.

28. The combination with a rotative slidecarrier shaft and meansY forgiving intermittent rotative movement thereto,"of a presseractuatingshaft, a part mounted'to turn on said presser-actuating shaft which isdriven from -the slide-carrier shaft, a spring connecting saidpresser-actuating shaft with said rotative part thereon, a rigidstop-arm on said presseractuating shaft, a detent adapted to engage saidarm, a lever connected with said detent, and cam-plates on one of theslide-carriers acting on said'lever to shift the detent and release thestop-arm.

29. The combination with a rotative slidecarrier and carrier-shaft, of areciprocating presser, a presser-actuating shaft, drivingconnectionsbetween said slide-carrier shaft and the presser-actuating shaftembracing a part mounted -to rotate on the presser-actuating shaft, aspring connecting said rotative part on the presser-actuating shaft withthe latter shaft, a stop-arm on said presser-actuating shaft, a detentadapted to engage said stoparm, means operated by the rotative carriers.

for actuating the said detent, and a spring-arm adapted to engage saidarm when in contact with the lsaid detent to prevent backward turning ofsaid presser-actuating shaft.

30. A slide-feeding apparatus comprising two slide holders, a rotativeslide carrier, means for giving intermittent rotative movement to saidslide-carrier, and means for controlling the speed of rotation of theslide-carrier, embracing a fan, and a train of gears driven by therotative slide-carrier and operating the fan.

31. The combination with a projecting apparatus, of two slide-holders,and a' rotative slide-carrier, the centers of said slide-holders and theoptical axis of the projecting apparatus being located at equaldistances from the axis of rotation of the slide-carrier, and

at equal angular distances from each other,

and the slide-carrier having slide-receiving apertures corresponding inlocation with said slide-holders and optical axis.

Y 32. The combination with two slide-holders, of a rotativeslide-carrier, va spring-motor for turning vsaid slide-carrier, a stopmechanism for the slide-carrier comprising a plurality of stops on saidcarrier, a detent engaging said stops, means foractuating said detent torelease it from the stop, and means for controlling the speed ofrotation of the carrier comprising a series `of gear-teeth on thecarrier, a train of gears operated by said gear-teeth, andia fanoperated by said train of gears.

33. The combination with a picture-projecting apparatus, yof twoslide-holders located at one side of the same, a rotative slide-carrierprovided with slide-receiving apertures adapted to be carried by theturning of the slidecarrier in the position opposite the twoslideholders, and also into position in line with the optical axis ofthe projecting apparatus, means for -moving the slides through one ofsaid slide-holders into -the apertures of the slidecarrier, and meansfor shifting the said slides froml the slide-carrier into the otherslideholder.-

34. The combination ofa projecting apparatus, a vertically-arrangedframe-plate, delivery and receiving slide-holders connected with saidplate, said plate being provided with two apertures which coincide withthe slideholders and a third aperture in line with the optical axis ofthe projecting apparatus, a rotative slide-carrier mounted at the frontface of the said plate, said slide-carrier being provided withslide-receiving apertures adapted to coincide with the apertures in thesaid plate, means forv moving the slides from one of said slide-carriersinto the slide-receiving apertures of the slide-carrier, and means forthrusting said slides from the apertures of the slide-carriers into theother slide-holder and through the latter.

A slide-feeding apparatus comprising a vertically-arranged frame-plate,delivery and receiving slide-holders connected with said plate,saidplate-being-provided with two apertures`=coinciding with saidholders and a lthirdape'rture in line with the optical axis ofslide-carrier into the receiving-holder, com-V prising a stationary supporting-plate attached at its outer margin to the said frame-plate andprojecting inwardly over the Vslide-carrier, a reciprocating pressermounted in said supporting-plate and adapted to act upon the slides toforce the same from the slide-carrier into the receiving-holder andmeans for giving reciprocatory motionto the said presser.

37. The combination with two slide-holders, of a rotative slide-carrierconsisting of va disk and arms pivoted to the disk, and'stops on thesaid disk to hold the pivoted arms extended when at the upwardly-movingside of the carrier.

38. The combination with a lantern or pro-` jecting apparatus, of twoslide-holders located at the side oi' the said projecting apparatus, arotative slide-carrier located at the front end of said holders, adaptedto receive the slides from one of the holders to carry the same intoposition for projection, to then carry the same to' the other holder,and a rotative slide-carrier at the rear of said slide-holders embracinga rotative disk, and a plurality of arms pivoted to the disk and adaptedto stand in an extended position at the rising side of the disk and tohang in a depending position at the descending side of the disk. y

3,9. The combination with a lantern or projecting apparatus of twoslide-holders located at one side of the said projecting apparatus, arotative slide-carrier located at the front end of said holders, adaptedto receive the slides from one of the holders, to carry the same intoposition for projection to then carry the same A to the other holder, arotative slide-carrier at the rear of saidslide-holders, embracing arotative disk, a plurality of arms pivoted to the disk adapted to standin an extended position at the rising side of the disk and to hang in adepending position at the descending side oit' the disk, and a curvedguide at the rear ends of said slide-holders adapted to engage the outeredges of the said slides when the samel are being moved by the saidarms.

40., The combination with two slid e-holders,

of a rotative slide-carrier consisting of a disk and arms pivotedto thedisk', stops on thesaid disk to hold the pivoted arms extended when atthe upwardly-moving side of the carrier, and a spring-actuateddetent-lever adapted to engage the free ends'oi' said arms totemporarily hold said arms in their upright positions.

41. A slide-feed apparatus comprisingtwoparallel vertically-arrangedframe-plates pro-y vided with apertures :for the passage of the slidesand two slide-holders each consisting of rods which extend between andattached at their ends to the said plates, said rods being madetelescopic to permit the length of the slide-holders to be adjusted.

,42. A slide-feeding apparatus comprisingY two vertically-arrangedparallel frame-plates, slide-holders formed by means of rods whichextend between Vand are connected with the plates, rotativeslide-carriers at the outer faces of the plates, and a shaft on whichthe said slide-carriers are mounted, said rods constiv tuting theslide-carriers being telescopic, and the slide-carrier at the rear ofthe holders being connected with the said shaft by a spline and grooveso that the rear plate may be shifted backwardlyA and forwardly to varythe length of the slide-holders. Y

43. The combination with two slide-holders,

of rotative slide-carriers, reciprocating press-r A. D. i903. Y

, WILLIAM M. GREEN.

JOHN R. GENT.

I Vitnesses:

C. .CLARENCE POOLE,Y lGrERClRUDn BRYCE.

